On the Absence of Non-thermal X-Ray Emission around Runaway O Stars
- Theoretical models predict that the compressed interstellar medium around runaway O stars can produce highenergy non-thermal diffuse emission, in particular, non-thermal X-ray and gamma-ray emission. So far, detection of nonthermal X-ray emission was claimed for only one runaway star, AE Aur. We present a search for non-thermal diffuse X-ray emission from bow shocks using archived XMM-Newton observations for a clean sample of six welldetermined runaway O stars. We find that none of these objects present diffuse X-ray emission associated with their bow shocks, similarly to previous X-ray studies toward. zeta ph and BD+ 43 degrees 3654. We carefully investigated multi-wavelength observations of AE Aur and could not confirm previous findings of non-thermal X-rays. We conclude that so far there is no clear evidence of non-thermal extended emission in bow shocks around runaway O stars.
Verfasserangaben: | Jesús Alberto ToalaORCiD, Lida OskinovaORCiDGND, R. Ignace |
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DOI: | https://doi.org/10.3847/2041-8213/aa667c |
ISSN: | 2041-8205 |
ISSN: | 2041-8213 |
Titel des übergeordneten Werks (Englisch): | The astrophysical journal : an international review of spectroscopy and astronomical physics ; Part 2, Letters |
Verlag: | IOP Publ. Ltd. |
Verlagsort: | Bristol |
Publikationstyp: | Wissenschaftlicher Artikel |
Sprache: | Englisch |
Jahr der Erstveröffentlichung: | 2017 |
Erscheinungsjahr: | 2017 |
Datum der Freischaltung: | 20.04.2020 |
Freies Schlagwort / Tag: | X-rays: ISM; stars: mass-loss; stars: massive; stars: winds, outflows |
Band: | 838 |
Seitenanzahl: | 5 |
Erste Seite: | 1 |
Letzte Seite: | 32 |
Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
Peer Review: | Referiert |